Home / Standards / GBT 21838.1-2019 GBT 21838.1-2019 Metallic materials — Instrumented indentation test for hardness and materials parameters — Part 1: Test method 金属材料 硬度和材料参数的仪器化压入试验 第1部分：试验方法 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A